Bobbin



June 1950 c. w. CEDERBERG BOBBIN Filed Oct. 28, 195'! fin... M 4

" o Iv w United States Patent BOBBIN Carl W. Cederberg, Attleboro, Mass, assignor to Larson Tool 8: Stamping Co., a corporation of Massachusetts Filed Oct. 28, 1957, Ser. No. 692,724

1 Claim. (Cl. 242-1181) This invention relates to an improvement in a metal core or bobbin, and more particularly to a bobbin upon which dyeing ofvyarn can take place and is a continuation in part of application Ser.'No. 526,631, filed August 5, 1955, and now abandoned.

Tubular cores or bobbins onto which yarn may be wound into packages for treating have heretofore been made of such materials as metal, wood, and paper and have usually comprised a tube having formed thereon a large plurality of. openings or slots for the treating liquid to pass therethrough. Additionally, it has become quite common to form on the surface of the tube or bobbin some ribs so that the first layer of the yarn will receive the proper dye treatment. Generally, these ribs extend in an axial direction of the bobbin, and in the past it has become ditficult to accurately wind the first few layers of yarn onto the tube or bobbin. One of the desirable features of the prior art bobbins has been to utilize the entire length of the bobbin, and thus when the bobbin is placed on the dyeing spindle or other treating spindle, it has been found that the yarn at the ends of the bobbin will not be properly treated unless spaces are utilized between the individual bobbins. Accordingly, in stacking a bobbin upon a spindle for treatment, it has been the practice to first place a bobbin on the spindle and then a spacer ring and then another bobbin, and so forth, until the complete spindle has been filled with bobbins.

It is an object of this invention, therefore, to improve generally upon tubes or bobbins of the prior art.

It is another object of the invention to provide a perforated metal tube or bobbin constructed so as to eliminate any slippage of the thread during the first winding of thread on the bobbin.

Another object of the invention is to provide a bobbin of a construction in which it is unnecessary to utilize spacer rings between individual bobbins when they are placed upon a treating spindle.

A further object of the invention is to eonstructa bobbin which will have spacing means associated therewith to maintain the bobbins spaced from the treating spindle with which it is generally associated.

-A further object of the invention is to provide a bobbin having circumferential ribs with depressions formed in the ribs in which depressions thread may be engaged during the winding of the first layers on the bobbin.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is an elevational view of a bobbin embodying my invention;

Figure 2 and 3 are sectional views taken along lines 2 2 and 3-3 respectively of Figure 1;

Figure 4 is a broken elevation view of two nested bobbins partially in section, and;

Figure 5 is an elevational view of two bobbins stacked 2,942,801 Patented June 28, 1 960 ige I upon a treating spindle with the yarn wound thereon, the yarn being broken away to show the bobbins.

In proceeding with the invention, a bobbin is made of sheet metal into tubular or open end cylindrical form. A plurality of circumferentially extending ribs are formed in the wall of this bobbin, and it is also pierced with a plurality of openings in staggered relationship. Certain rows of openings extend directly through the ribs in the wall of the bobbin and form depressions in said ribs which have edges that are adapted to engage and hold the thread of the first wound layers or courses in proper position axially of the bobbin and thus prevent slippage thereof. Each end portion of the bobbin is provided with a series of closely spaced parallel ribs which prevent the thread from slipping axially off the end of the bobbin, the thread being allowed to enter the grooves between said ribs. One end of the bobbin is terminated in a simple bead extending circumferentially around the end while the other end of the bobbin is formed with a raised rib which then flares inwardly to form an internal flange.

Referring now to the drawing, the numeral 10 generally indicates a tube or bobbin which is made of sheet metal or other suitable material which is open at both ends thereof. The lower end of the tube is formed with a head 11, which is shown in more detail and in cross section in Fig. 4. The upper end of the tube is formed with a rib 12 and is then turned inwardly on a curvature as at 13 to form a seat for the bead 11 of the adjacent bobbin, as will more fully hereinafter appear. The inward curvature at 13 is then continued to provide an inwardly turned flange 14. The surface of the tube is formed with a plurality of circumferential ribs 15 which may be convex in cross section and which join the adjacent surface of the tube in a reversed curvature. A rib 15 may be formed somewhat centrally of the surface of the bobbin which may be indented at equally spaced locations as at 16. This rib 15 is formed in such a manner so as to cooperate with spring buttons which are found on certain winding spindles, the indents 16 serving as a stop for the button to secure driving engagement therewith. At either end of the surface of the tube or bobbin, there are provided a plurality of closely spaced circumferential ribs 17 and 18, which allow the threads of the first layers that are wound upon the bobbin to engage as the winding operation changes its traverse for the succeeding layer. Thus, the thread when it reaches the end of its traverse, will engage the grooves 22 formed between the ribs 17 and 18 and prevent the slippage thereof axially of the tubular bobbin.

Throughout the substantial length of the tubular bobbin, the wall tbereof is pierced with a plurality of rows of spaced openings 20, which may be circular, and which are preferably formed so that the openings in one row extend in staggered relation to the openings in the adjacent rows. These openings are arranged so that they will fall in alignment with the ribs 15, forming depressions 21 in said ribs for the thread to enter and engage against the edge of said depressions. When the thread, therefore, is so engaged, it will be prevented from slipping axially of the bobbin as the thread is being wound thereon and also during the unwinding operation.

The surface of the bobbin, therefore, is provided with a multiplicity of yarn or thread receiving depressions which are at a location raised slightly above the main outer surface of the tubular bobbin. As the thread enters one of the depressions in its traverse, it Will be prevented from axially slipping and also the grooves 22 at' the end of the bobbin will prevent axial slippage at the end of the traverse since the thread enters the grooves 22 formed between the ribs 17 and 18.

Referring now particular to Fig. 4 of the drawings, it

'an adjacently disposed tubular bobbin. Additionally,

the edge of the inturned flange 14 is disposed in close proximity to the outer Wallof the dyeing tube 23. The arrangement thns is such that aifiisst bobbin may be slipped over the dyeing tube 23 so that its beaded .end'll nests upon a gasket, notshownL Then a second-bobbin is placed over the first with its beaded :portion 11 nesting in the ,inturned portion 13'and1so on until astack of many bobbins is placed onthe dyeing 'spindle. The -rib-12 at the end of each ofthe tubular bobbins serves to space the ends. of the wound thread uni-33 bobbin a sufiicient amount so that no interference. is had therebetween during ,the dyeing process. so that it has an eguivalent axial dimension nearly that of the formerly used-spacing rings.

Accordingly, by this particular construction, I haveprovided a unitary bobbin which is formed at either end thereof in a manner so, that it will nest and also align. itself with the dyeing spindle. It will be obvious that such a construction will thus speed up, the loading of a dyeing spindle and eliminate the need for the operator fishingfor spacing rings, which .might easily be dropped and lost on the door.

I claim: I

A perforatedcylindrical bobbin on which yarn is helically wound ,into a packagefor dyeing, said bobbin being openat each, end, the wall of said bobbin being provided In eifect. the rib 12 is dimensioned with aplnrality of spaced. circumferential:ribs extending on a curvature cross-Wise thereof that is small compared to the radius of. the bobbin, each of said ribs having spaced openings therethrough forming shoulders extending generally laterally across saidribs for engaging the initial layers of helically Wound yarn on said bobbin, said bobbin having an enlarged bead at one end thereof providing a restricted opening to the bore of the bobbin, said bobbin being reduced at the other end thereof providing an annular seat extending inwandly from the wall of the bobbin, an inturnedffiange extending radially inward from said seat said bobbin being adapted to be positioned on an adjacent bobbinwith the reduced portion thereof extending into said restricted opening, and having a snug engagement therein, said bead seating on the annular seat of said adjacent bobbin, and said flange cooperating with a spindle on which said bobbins are placed whereby said bobbins may be stacked in end to end relation and lateral movement is prevented.

References Cited in the'file of this patent UNITED STATES. PATENTS 1,646,198 Ham .,V Oct. '18, 1927 1,949,291 Bartheltnes Feb. 27, 1934 2,096,126 McKinney Oct. 19, 1937 2,377,919 Atwood June 12, 1945 2,633,729 Slaughter Apr. 7, 1953 2,834,597 Metzler et al. May '13, 1958 

